Operation panel of a working machine



FIG. 1 is a top front perspective view of an operation panel of a working machine showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof; and,

FIG. 8 is a reference view showing the operation panel of the present invention in an environment in which it may be used.

The broken line showing of a working machine in FIG. 8 is included for the purpose of illustrating environmental structure only and forms no part of the claimed design. 

CLAIM The ornamental design for an operation panel of a working machine, as shown and described. 